Optics continuum最新文献_第10页

Systematic comparison of head mounted display colorimetric performance using various color characterization models 使用不同颜色表征模型的头戴式显示器色度性能的系统比较

Optics continuum Pub Date : 2023-06-14 DOI: 10.1364/optcon.493238

Ujjayanta Bhaumik, F. Leloup, Kevin A. G. Smet

{"title":"Systematic comparison of head mounted display colorimetric performance using various color characterization models","authors":"Ujjayanta Bhaumik, F. Leloup, Kevin A. G. Smet","doi":"10.1364/optcon.493238","DOIUrl":"https://doi.org/10.1364/optcon.493238","url":null,"abstract":"The advancement of virtual reality in recent times has seen unprecedented applications in the scientific sphere. This work focuses on the colorimetric characterization of head mounted displays for psychophysical experiments for the study of color perception. Using a head mounted display to present stimuli to observers requires a full characterization of the display to ensure that the correct color is presented. In this paper, a simulation is done to mimic a practical display with color channel interactions and characterization of simulated data is done using the following models: gain offset gamma model, gain offset gamma offset model, gain gamma offset model, piecewise linear assuming chromaticity constancy model, piecewise linear model assuming variation in chromaticity, look-up table model, polynomial regression model, and an artificial neural network model. an analysis showed that the polynomial regression, artificial neural network, and look-up table models were substantially better than other models in predicting a set of rgb values, which can be passed as input to a head mounted display to output desired target xyz values. both the look-up table and polynomial regression models could achieve a just noticeable difference between the actual input and predicted output color of less than 1. the gain offset gamma, gain offset gamma offset, and gain gamma offset models were not effective in colorimetric characterization, performing badly for simulations as they do not incorporate color channel interactions. the gain offset gamma model was the best among these three models and the lowest just noticeable difference it could achieve was over 13, clearly too high for color science experiments.","PeriodicalId":74366,"journal":{"name":"Optics continuum","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45149407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PDTANet: A Context-guided and Attention-aware Deep Learning Method for Tumor Segmentation of Guinea Pig Colorectal OCT Images PDTANet:一种上下文引导和注意感知的豚鼠结肠直肠OCT图像肿瘤分割的深度学习方法

Optics continuum Pub Date : 2023-06-06 DOI: 10.1364/optcon.493630

Jing Lyu, Lin Ren, Qi Liu, Wang Yan, Zhenqiao Zhou, Yueyan Chen, Hongbo Jia, Yuguo Tang, Min Li

引用次数: 0

Degree of Polarization of Luminescence from InPunder SiN stripes: Fits to FEM Simulations InPunder SiN条纹发光偏振度的有限元模拟

Optics continuum Pub Date : 2023-06-02 DOI: 10.1364/optcon.481902

D. Cassidy, J. Landesman

引用次数: 0

Dispersion study of a broadband terahertz focusing reflecting metasurface for 6G wireless communication 6G无线通信宽带太赫兹聚焦反射超表面色散研究

Optics continuum Pub Date : 2023-06-02 DOI: 10.1364/optcon.493627

Fahim Ferdous Hossain, John F. OHara

{"title":"Dispersion study of a broadband terahertz focusing reflecting metasurface for 6G wireless communication","authors":"Fahim Ferdous Hossain, John F. OHara","doi":"10.1364/optcon.493627","DOIUrl":"https://doi.org/10.1364/optcon.493627","url":null,"abstract":"In 6G wireless communications, functional terahertz reflecting metasurfaces are expected to play increasingly important roles such as beamforming and beamsteering. However, their performance optimization as a function of multiple competing design parameters remains a significant challenge. This paper demonstrates a multi-dimensionally optimized design of a functional and efficient focusing metasurface reflector in the burgeoning D-band (0.11-0.17 THz). In addition to achieving 20% fractional bandwidth (0.135-0.165 THz), this design is polarization-maintaining, diffraction limited, simple in design, and exhibits 64.1% broadband power efficiency (1.9 dB insertion loss). We perform a unique study of the magnitude of temporal (group-delay) dispersion introduced by this design to the broadband signal at the focus. Despite being formed by an array of highly dispersive resonators, the metasurface exhibits very low dispersion, which avoids pulse reshaping and its consequent limitations on achievable data rate. The low dispersion characteristic of the metasurface is a consequence of its optimized design. The design and performance of the focusing reflector are presented followed by a dispersion analysis revealing that only 2.83% temporal broadening of the pulse is observed at the focus.","PeriodicalId":74366,"journal":{"name":"Optics continuum","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41838134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

System analysis of common-path heterodyne polarimeter 共路外差偏振计系统分析

Optics continuum Pub Date : 2023-06-01 DOI: 10.1364/optcon.484697

Ming-Hung Chiu, Jun Lin

引用次数: 0

Spiking ruby revisited: self-induced periodic spiking oscillations leading to chaotic state in a Cr:Al₂O₃ laser with cw 532-nm pumping 重新审视尖峰红宝石：导致Cr:Al混沌状态的自发周期性尖峰振荡₂O₃ 532nm连续泵浦激光器

Optics continuum Pub Date : 2023-05-31 DOI: 10.1364/optcon.497640

K. Otsuka, S. Sudo

引用次数: 0

Programmable coding metasurface controlled by Ultraviolet light-patterns 可编程编码超表面控制的紫外线光模式

Optics continuum Pub Date : 2023-05-28 DOI: 10.1364/optcon.488888

Zui Shen, F. Ye, Hongrui Tan, Sisi Luo, H. Cui, Lei Chen